/*
 * File: vfsdriver.c
 *
 * Description: This is a driver program for testing your VFS system using an interaction script as input
 * You need to make additional calls to your respective functions as noted in the comments below
 * Make sure the output you display is exactly as per the given specifications for you. Do NOT print
 * any extra output (like debug messages) in the final version of your driver program. You can use this driver program
 * in a in incremental manner as you keep implementing one operator after another. For operators not yet implemented,
 * you can leave the output as given ("TO_BE_DONE"). So you can use this program as your "main" program for testing purposes.
 *
 * DO NOT write the full code for operators in the driver program! You must only CALL your functions from here.
 *
 * Usage: vfsdriver <scriptfilename>
 */

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include <errno.h>

#include "fileHandling.h"
#include "dirOperations.h"
#include "fileOperations.h"

#define BUFSIZE 350
#define CMDSIZE 30
#define PARSIZE 100

void createvfs ( char *P1, int P2 );
void mountvfs ( char *P1 );
void unmountvfs ( char *P1 );
void makedir ( char *P1, char *P2 );
void deletedir ( char *P1 );
void movedir ( char *P1, char *P2 );
void listdir ( char *P1, int P2, char *P3 );
void addfile ( char *P1, char *P2, char *P3 );
void listfile ( char *P1, char *P2 );
void updatefile ( char *P1, char *P2 );
void removefile ( char *P1 );
void movefile ( char *P1, char *P2 );
void copyfile ( char *P1, char *P2 );
void exportfile ( char *P1, char *P2 );
void searchfile ( char *P1, char *P2 );

void processcommand( char *command, char *P1, char *P2, char *P3 );

int main( int argc, char *argv[] )
{
	FILE *scriptfp;
	char linebuffer[BUFSIZE];
	char command[CMDSIZE], par1[PARSIZE], par2[PARSIZE], par3[PARSIZE];
	char *token;
	
	 
	if( argc != 2 ){
		fprintf(stderr,"Usage: vfsdriver <scriptfile>\n");
		return(1);
	}

	if( (scriptfp=fopen(argv[1],"r")) == NULL ){
		
		fprintf(stderr,"Unable to open script file: %s\n", argv[2]);
		return(2);
	}

	while( fgets(linebuffer, sizeof(linebuffer), scriptfp) != NULL ){
		/* This output is for debugging... do not uncomment in final version */
/*
		
		printf("==================================================\n");
		printf("Processing: %s", linebuffer);
		printf("==================================================\n");
		
*/

		/* Remove the extra newline character in the end of line */
		linebuffer[ strlen(linebuffer)-1 ] = '\0';
		
		/* Get the command and the parameters using tokenizer */
		strcpy( command, (token = strtok(linebuffer, " ")) == NULL ? "" : token );
		
		strcpy( par1, (token = strtok(NULL, " ")) == NULL ? "" : token );
		strcpy( par2, (token = strtok(NULL, " ")) == NULL ? "" : token );
		strcpy( par3, (token = strtok(NULL, " ")) == NULL ? "" : token );
	// printf("Command:%s:p1:%s:p2:%s:p3:%s:\n",command, par1, par2, par3); 

		processcommand( command, par1, par2, par3 );
	}
        return 0;
}

void processcommand( char *command, char *P1, char *P2, char *P3 )
{
	if( strcmp(command, "createvfs") == 0 ){
		int size = atoi(P2);
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("createvfs_FAILURE %s\n",ERR_VFS_CREATE_00);
					
		}
		else
			createvfs (P1,size);
	}
	else if( strcmp(command, "mountvfs") == 0 ){
		if(strlen(P1) == 0)
		{
			printf("mountvfs_FAILURE %s\n",ERR_VFS_MOUNT_00);
			
		}	
		else
			mountvfs (P1);
	}	
	else if( strcmp(command, "unmountvfs") == 0 ){
		if(strlen(P1) == 0)
		{
			printf("unmountvfs_FAILURE %s\n",ERR_VFS_UNMOUNT_00);
			
		}
		else
			unmountvfs (P1);	
	}	
	else if( strcmp(command, "makedir") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
				printf("makedir_FAILURE %s\n",ERR_VFS_MAKEDIR_00);
				
		}
		else
			makedir (P1,P2);	
	}	
	else if( strcmp(command, "deletedir") == 0 ){
		if(strlen(P1) == 0)
		{
			printf("deletedir_FAILURE %s\n",ERR_VFS_DELETEDIR_00);
			
		}
		else
			deletedir (P1);	
	}
	else if( strcmp(command, "movedir") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("movedir_FAILURE %s\n",ERR_VFS_MOVEDIR_00);
			
		}
		else
			movedir (P1,P2);	
	}	
	else if( strcmp(command, "listdir") == 0 ){
		int flag = atoi(P2);
		if((strlen(P1) == 0) || (strlen(P2) == 0) || (strlen(P3) == 0))
		{
			printf("listdir_FAILURE %s\n",ERR_VFS_LISTDIR_00);
				
		}
		else
			listdir (P1,flag,P3);
	}
	else if( strcmp(command, "addfile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0) || (strlen(P3) == 0))
		{
			printf("addfile_FAILURE %s\n",ERR_VFS_ADDFILE_00);
				
		}
		else
			addfile (P1,P2,P3);	
	}	
	else if( strcmp(command, "listfile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("listfile_FAILURE %s\n",ERR_VFS_LISTFILE_00);
			
		}
		else
			listfile (P1,P2);	
	}	
	else if( strcmp(command, "updatefile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("updatefile_FAILURE %s\n",ERR_VFS_UPDATEFILE_00);
				
		}
		else
			updatefile (P1,P2);	
	}	
	else if( strcmp(command, "removefile") == 0 ){
		if(strlen(P1) == 0)
		{
			printf("removefile_FAILURE %s\n",ERR_VFS_REMOVEFILE_00);
				
		}
		else
			removefile (P1);	
	}	
	else if( strcmp(command, "movefile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("movefile_FAILURE %s\n",ERR_VFS_MOVEFILE_00);
				
		}
		else
			movefile (P1,P2);	
	}	
	else if( strcmp(command, "copyfile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("copyfile_FAILURE %s\n",ERR_VFS_COPYFILE_00);
				
		}
		else
			copyfile (P1,P2);	
	}		
	else if( strcmp(command, "exportfile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("exportfile_FAILURE %s\n",ERR_VFS_EXPORTFILE_00);
				
		}
		else
			exportfile (P1,P2);	
	}		
	else if( strcmp(command, "searchfile") == 0 ){
		if((strlen(P1) == 0) || (strlen(P2) == 0))
		{
			printf("searchfile_FAILURE %s\n",ERR_VFS_SEARCHFILE_00);
				
		}
		else
			searchfile (P1,P2);
	}
	else
		printf("Ignoring invalid command %s\n", command);
}

void createvfs ( char *P1, int P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
	//create the vfs ... pass the name and size entered by user
			res = creatVFS(P2 , P1);
				
		
}

void mountvfs ( char *P1 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
	
		res = mount(P1);
}

void unmountvfs ( char *P1 )
{

	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		unMount(P1);
}

void makedir ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = makeDir(P1 , P2);


}

void deletedir ( char *P1 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
	
		res = deleteDir(P1);


}

void movedir ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = moveDir(P1 , P2);


}

void listdir ( char *P1, int P2, char *P3 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = listDir(P1 , P2 , P3);


}

void addfile ( char *P1, char *P2, char *P3 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = addFile(P1 , P2 , P3);


}

void listfile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = listFile(P1 , P2 );
}

void updatefile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = updateFile(P1 , P2);


}

void removefile ( char *P1 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = removeFile(P1);


}

void movefile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = moveFile(P1 , P2);


}

void copyfile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = copyFile(P1 , P2);


}

void exportfile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
		res = exportFile(P1 , P2);


}

void searchfile ( char *P1, char *P2 )
{
	int res;
	/* Call the appropriate function with given arguments and display appropriate output on the screen */
	
		res = searchFileHash(P1 , P2);
}


